Question

The product of hydrolysis of propyne in the presence of 1% \( HgSO_4 \) and 40% \( H_2SO_4 \) is ___________.

• A. methanal
• B. ethanal
• C. propanal
• D. propanone

Hint:

The hydration of alkynes, like propyne, often results in ketones due to the Markovnikov's rule and subsequent keto-enol tautomerism.

Answer 1

The Correct Option is D

When propyne \( (CH_3 - C \equiv CH) \) is treated with 1% \( HgSO_4 \) and 40% \( H_2SO_4 \), it hydrates according to Markovnikov's rule, initially forming an enol that subsequently tautomerizes into propanone \( (CH_3 - CO - CH_3) \), the most stable keto form. 
Therefore, the correct answer is (d) propanone.